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The FengGang second distict is upper yangtze region.The shale gas reservoir was Longmaxi Formation and Niutitang Formation.According to the geological findings,Niutitang Formation is full regional coverage,and there are outcrops in the northwest corner.2-D seismic interpretation and drilling data shows that its depth is between 1800m-4500m.Because of its upper stratum lithology is similar to the Mingxinsi Formation,preliminary delineation Niutitang thickness is between 60-80m.According to the conclusions core analysis,the Niutitang.Formation can be divided into two groups.The upper part is dark shale,Argillaceous sedimentary is the major.From cores phosphorus can find a combination of a large block,developed horizontal bedding,small dip.The bottom of black rock shale can see the pyrite layer distribution,the upper is the rare metal layer (Nickel,Molybdenum,Vanadium,etc.),contact with the upper horizontal.The lower mainly is phosphorus rocks,also there is Carbonate Nodules and Pyrite,This horizons has phosphorus and gray lenses,massive bedding,horizontal bedding and other sedimentary structures.Analysis shows that:This area should be restored to deep water depositional environment,Anoxic sediments black shale deposition weaker hydrodynamic.The lower phosphorus rock section may be stronger coastal sedimentary hydrodynamic.